【摘要】 本文介绍一种带源补偿的吸收光谱测量方法。利用锁相放大器选频放大和相干接收的特点，用双光路分光，由单探头同时接收源光强和透射光强更多还原

【Abstract】 A kind of method of measuring spectral transmittivity with source compensated is introduced in this paper.It detects simultaneously intensity of source and transmission light with dual light road and one detector by means of the characters of selective frequence amplifing and coherent detection of a lock in amplifier.The experimental result shows that the method is excellent on overcoming shake of a source and improving signal to noise ratio.更多还原